【High Quality】Made out of aerospace-grade aluminum it has a helix-shaped groove milled alongside the whole surface. Designed to spin on any desk or flat surface. The 38mm solid spherical body and smooth finish make it very pleasant to interact with. Every globe has a rotating base equipped with a high-quality stainless steel bearing. It guarantees a smooth and silent spin as well as long-lasting. 【Optical illusion for the whole body】A precisely machined ball rotates easily to create a 360° optical illusion of a continuous flowing helix, and the optical illusion changes with direction and speed of rotation. Looks like a continuously flowing helix goes into a tabletop. 【Unique Design】Simply rotate it by hand to create an almost magical effect that looks like a continuously flowing helix would merge into a tabletop surface. It spins silently so you won't be bothering anyone around. There is something oddly attractive about the shape of the sphere- it just asks to be held in a palm. 【Inspiration for creativity and stress relief】When revolving it creates a full-body optical illusion. It's mainly suitable for creators, makers, thinkers, and anyone who wants to release their inner creativity and imagination. Also for fidgeting, autism, depression, anxiety, ADHD, staying awake and other problems with attention disorders, such as nail chewing, smoking, leg shaking, etc. 【Novelty Gift】 Want to surprise someone? We believe the optical illusion is a unique way to bring excitement to anyone. We believe our visual illusion ball can be an ideal Christmas gift, New year gift, birthday gift, or another festival present. Each unit is designed with attention to the smallest detail and built to last a lifetime.